Unit 7 An Amazing Plant 现在完成时表植物生长的结果since 引导时间状语-2025-2026学年八年级英语下册语法知识点全解（教科版五四制）

8下教科版（五四制） 【语法专版】 Unit7核心突破 核心语法 【专题】现在完成时表植物生长的结果； since引导时间状语 Unit 7 An Amazing Plant 考频分析 8下教科版（五四制）中，现在完成时表植物生长的结果及since引导时间状语是Unit7的核心语 法点，考频占本单元语法考察总量的30%左右，主要分布在核心题型：单项选择(1-2题)、完形 填空(2-3题)、语法填空(1-2题)、阅读理解（细节理解题中涉及植物生长过程的时间线索判断）。 在语境理解类题目中，需重点关注现在完成时与植物生长结果的关联以及since引导的时间状语对 时态的提示作用，这是解题的关键。 考查内容 (缺失) 知识点一：现在完成时表植物生长的结果及since用法 1.现在完成时表植物生长的结果（过去发生并持续到现在的生长状态，强调 对现在的影响) 1.时间标志词 since+时间点（如since last spring“自从去年春天”、since2023“自从2023年”）、for+时间段（如 for two months“持续两个月”，可结合植物生长场景) 2.主动语态 结构：主语（植物类名词）+has/have+动词过去分词（植物生长相关动词，如grow“生长”、develop “发育”、reach“达到”等；主语为单数植物用has,复数植物用have) 例句： ·This bamboo has grown3 meters since last summer.（主语单数，用has grown;表从去年夏天到现 在竹子生长的结果) ·These saplings have developed strong roots since they were planted.(主语复数，用have developed; 表从被种植到现在幼苗根系生长的结果) 8下教科版（五四制） 【语法专版】 Unit7核心突破 3.被动语态（植物生长场景较少用被动，此处结合课标要求补充） 结构：主语（植物相关事物）+has/have been+动词过去分词（如watered“浇水”、protected“保护” 等，体现被动动作对生长结果的影响) 例句： ·The flower has been watered carefully since it was bought.(主语单数，用has been watered:表从购 买到现在被精心浇水，对生长状态的影响) 。These seeds have been protected from the cold since last autumn.(主语复数，用have been protected: 表从去年秋天到现在被保护免受寒冷，对发芽结果的影响) 2.since引导时间状语的用法（与植物生长现在完成时搭配) 1.接时间点（具体过去时间) 结构：since+过去时间名词/短语（如since2024“自从2024年”、since last month“自从上个月”） 例句：The apple tree has borne fruit since2023.(这棵苹果树自从2023年就结果了) 2.接一般过去时句子（过去动作发生的时间点） 结构：since+主语+动词过去式（如since the plant was sown“自从这株植物被播种”） 例句：The vine has climbed to the roof since it was planted in spring.(这株藤蔓自从春天被种下就一直 爬到了屋顶) 3.与现在完成时的关系 规则：主句用现在完成时(has/have+过去分词)，since从句用一般过去时（动词过去式），强调从 过去动作时间点到现在的生长持续过程或结果 例句：We have watched the sunflower grow taller since it sprouted.（自从向日葵发芽，我们就看着它 越长越高了) 知识点二：现在完成时表植物生长的结果 1.基本结构 主语+have/has+过去分词(gowm/developed等) 核心用法（描述生长结果）： 1.The bamboo has grown3 meters since last spring.(竹子自去年春天以来已长了3米。) 2.This plant has developed new leaves in the past two months.(这株植物在过去两个月里长出了新 叶。) 3.Their roses have bloomed beautifully after the rain.(雨后他们的玫瑰开得很漂亮。) 2.since引导时间状语的搭配 2 8下教科版（五四制） 【语法专版】 Unit7核心突破 基础时间标志（中考必背）： 1.since+过去时间点→例句：The tree has stood here since2010.(这棵树自2010年起就立在这 里了。) 2.since+一般过去时从句→例句：The flowers have looked fresh since we watered them.（自从我 们浇了水，这些花就一直很新鲜。) 3.since+时间段+ago→例句：The grass has covered the garden since three weeks ago.(三周前以 来，草地就覆盖了整个花园。) 3.植物生长语境的高频动词 过去分词搭配（贴合单元主题）： 1.gow→grown(生长)→例句：The sunflower has grown taller than the fence.(向日葵长得比 栅栏还高了。) 2.bloom→bloomed(开花)→例句：The cherry tree has bloomed twice this year.(这棵樱花树今 年已经开了两次花。) 3.spread一spread(蔓延)→例句：The ivy has spread over the wall since last summer.(自去年夏 天以来，常春藤已经爬满了墙壁。) 4.survive一survived(存活)→例句：The small plant has survived the cold winter.(这株小植物 熬过了寒冷的冬天。) 5.develop→developed(发育)→例句：The seed has developed into a strong plant..(种子已长成 一株茁壮的植物。) 考法精析 考法一：现在完成时表植物生长结果及since用法 核心：根据植物生长场景和sce引导的时间状语，判断并使用现在完成时的主动语态结构 真题1（语法填空）： The rose bush_(produce)many red flowers since last month. 答案：has produced 解析：由时间标志词“since last month”(since+时间点)可知，动作从过去开始持续到现在，用现 在完成时；主语为单数，助动词用has,produce的过去分词为produced。 真题2（单项选择)： The ivy__over the fence since last autumn 3 8下教科版（五四制） 【语法专版】 Unit7核心突破 A.spread B.spreads C.has spread D.will spread 答案：C 解析：由时间标志词“since last autumn”(since+时间点)可知，动作从过去开始持续到现在，用现 在完成时，结构为“has+过去分词”，spread的过去分词为spread,故选C。 考法二：现在完成时与since引导时间状语的综合运用 核心：结合植物生长场景，根据sice引导的时间状语（时间点/过去时句子），正确运用现在完成 时结构及动词过去分词 真题1（语法填空)： The rose bush一(produce)many flowers since last month.(这丛玫瑰自从上个月已经开出了很多 花。) 答案：has produced 解析：由时间标志词“since last month”可知，动作从过去开始持续到现在，用现在完成时：主语 为单数，助动词用has,produce的过去分词为produced。 真题2（单项选择）： The ivy_over the wall since itlast spring. A.has spread;planted B.spread;was planted C.has spread;was planted D.spread;planted 答案：C 解析：由“since”可知主句用现在完成时(has spread),since引导的从句用一般过去时，且“it(iy)” 与“plant”是被动关系，用一般过去时的被动语态“was planted”。 考法三：现在完成时被动语态与sice用法及动词运用综合考查 核心：结合植物生长场景，判断被动动作对生长结果的影响，正确使用现在完成时被动语态结构 (has/have been+过去分词)，掌握since引导时间状语（接时间点或一般过去时句子）的用法及相 关动词过去分词形式。 真题1（单项选择)： These young trees-well since they_in the garden last autumn. A.have grown;planted B.have been grown;planted C.have grown;were planted D.have been grown;were planted 答案：D 解析：主语“These young trees'”是“grow”的承受者（树被种植后生长，此处强调被动种植对生 长的影响，用被动语态)，由“since”可知主句用现在完成时，结构为“have been grown”;since从 句需用一般过去时，“they”(trees)是“plant”的承受者，用一般过去时被动语态“were planted”。 4 8下教科版（五四制） 【语法专版】 Unit7核心突破 真题2（语法填空)： The rose bush_(water)carefully by my grandma since it _(buy)two months ago.Now it looks very healthy. 答案：has been watered,:was bought 解析：第一空，主语“The rose bush”是“water'”的承受者，用被动语态，由“since two months ago” 可知用现在完成时，结构为“has been watered”;第二空，since从句用一般过去时，“it”(rose bush) 是“buy”的承受者，用一般过去时被动语态“was bought'”。 解题小妙招 植物生长时态妙招 since时间作标志，完成时态立即用： 主动结构has/have+done”,主语单数has先行； 被动语态看关系，承受动作用be done'”: since从句有特点，过去时态莫忘记： 生长动词过去分词，规则不规则要记清： 主动被动需分明，结合语境辨仔细。 真题演练 演练一：单项选择试题（共10题) 1.The sunflower to 1.5 meters since last summer A.grow B.grows C.has grown D.will grow 2.These tomato plants many red fruits since September A.produce B.produced C.have produced D.will produce 3.The bambooquickly since it_in spring A.grows,is planted B.has grown;was planted C.grew;planted D.has grown;planted 4.We_the garden every day since the flowers_ A.visit;bloom B.visited;bloomed C.have visited;bloomed D.have visited;have bloomed 5.The ivy_over the wall since last autumn A.spread B.spreads C.has spread D.will spread 6.The old tree in this park since 2005 A.stands B.stood C.has stood D.will stand 7.Many beautiful rosesby this bush since last month A.bloom B.bloomed C.have bloomed D.have been bloomed 5 8下教科版（五四制） 【语法专版】Unit7核心突破 8.The little plant the cold winter since last December A.survives B.survived C.has survived D.will survive 9.the apple treeany fruits this year? A.Does;bear B.Did;bear C.Has;borne D.Will;bear 10.How long the grass in this field? A.does;grow B.has,grown C.did;grow D.will;grow 演练二：填空试题（共10题） 1.The pine tree_(stand)here since 2010. 2.These flowers_(bloom)beautifully since last week 3.The gardener(watch)the plant grow every day since it sprouted. 4.The bamboo(grow)very tall since last spring 5.Many birds(be)attracted by the tree since it became tall 6.The rose bush_(produce)more than 20 flowers since last month. 7.We_(water)the plants every morning since they were planted. 8.The ivy-(spread)over the entire wall since last summer. 9.The little seedling-(grow)into a big tree since 2015 10.This kind of plant_(survive)in the desert since many years ago. 演练三：语法填空试题（一篇文章） A Special Plant My grandmother gave me a small plant as a gift three years ago.I planted it in my garden and 1)(watch)it grow every day since then.The plant 2)(not grow)very tall in the first year,but it 3)(become)stronger after each season. Last spring,something amazing happened.The plant 4)(sprout)some small buds.Since then,it 5)(bloom)beautiful purple flowers every month.Many butterflies and bees 6)(visit)my garden be- cause of these flowers. My grandmother often tells me that this plant 7)(be)in our family for over 10 years.It 8)(survive) many storms and cold winters.Last winter was very cold,but the plant 9)(not die).It 10)(teach)me that life can be strong and beautiful if we take good care of it. 答案区 演练-：1.C2.C3B4.C5.C6.C7.D8.C9.C10.B 演练二： 1.has stood 6 8下教科版（五四制） 【语法专版】 Unit7核心突破 2.have bloomed 3.has watched 4.has grown 5.have been 6.has produced 7.have watered 8.has spread 9.has grown 10.has survived 演练三： 1.have watched 2.didn't grow 3.has become 4.sprouted 5.has bloomed 6.have visited 7.has been 8.has survived 9,didn't die 10.has taught >